/*
==================================================
  Optimized CSS for OK Trading Platform Website
  Version: 2.0 (Corresponds to the final HTML)
  Description: A lean, performant, and maintainable stylesheet.
==================================================

TABLE OF CONTENTS
------------------
1.  :root - CSS Variables (Global Theme)
2.  Global Styles & Typography
3.  Header & Navigation
4.  Mobile Menu (Slicknav)
5.  Hero Section
6.  Service Section
7.  App CTA (Call to Action) Section
8.  Feature Section
9.  Screenshot / Video Section
10. FAQ Section
11. Footer
12. Utility & Animation Classes

==================================================
*/

/* 1. :root - CSS Variables (Global Theme)
-------------------------------------------------- */
:root {
  /* Colors */
  --color-primary: #575757;        /* Primary brand color, dark gray */
  --color-primary-dark: #0b0b0b;     /* Very dark gray/black for header/footer */
  --color-accent: #FFCC2F;         /* Yellow accent for highlights and links */
  --color-accent-dark: #ffcb2a;     /* Slightly darker accent */
  --color-background-light: #fff;     /* White background */
  --color-background-gray: #f9f9f9;  /* Light gray for section backgrounds */
  --color-text-light: #fff;        /* Light text for dark backgrounds */
  --color-text-dark: #333;         /* Primary dark text color */
  --color-text-medium: #666;        /* Medium gray for paragraphs */
  --color-text-subtle: #999;        /* Subtle gray for less important text */
  --color-button-cta: #4a3fbf;      /* Blue color for CTA buttons */

  /* Fonts */
  --font-primary: 'Exo 2', sans-serif;
  --font-secondary: 'Roboto', sans-serif;

  /* Transitions */
  --transition-fast: all 0.3s ease-in-out;
}

/* 2. Global Styles & Typography
-------------------------------------------------- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-secondary);
  color: var(--color-text-medium);
  background-color: var(--color-background-light);
}

a, a:hover, a:focus {
  text-decoration: none;
  -webkit-transition: var(--transition-fast);
  transition: var(--transition-fast);
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 34px;
  font-weight: 600;
  color: var(--color-text-dark); /* Changed for better contrast on light bg */
  text-transform: uppercase;
}

.section-title p {
  margin-top: 15px;
  font-size: 19px;
  color: var(--color-text-subtle);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.bg-gray {
  background-color: #000000;
}


/* 3. Header & Navigation
-------------------------------------------------- */
.header-area {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 999;
  width: 100%;
  padding: 15px 0;
  background: transparent; /* Changed for hero overlay */
  -webkit-transition: background-color 0.3s ease;
  transition: background-color 0.3s ease;
}

.sticky-menu {
  position: fixed;
  background-color: var(--color-primary-dark);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.logo a {
  display: inline-block;
}

.logo a img {
  max-width: 120px;
}

.main-menu nav ul {
  text-align: right;
  margin: 0;
  padding: 0;
  list-style: none;
}

.main-menu nav ul li {
  display: inline-block;
}

.main-menu nav ul li a {
  color: var(--color-text-light);
  font-size: 16px;
  font-weight: 500; /* Bolder for better visibility */
  margin-left: 33px;
  position: relative;
  padding: 5px 0 5px 16px; /* Added top/bottom padding for bigger click area */
  text-transform: capitalize;
}

.main-menu nav ul li.active a,
.main-menu nav ul li a:hover {
  color: var(--color-accent);
}

.main-menu nav ul li a::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 50%;
  transform: translateY(-50%);
  height: 2px;
  width: 15px;
  opacity: 0;
  background: var(--color-accent-dark);
  -webkit-transition: var(--transition-fast);
  transition: var(--transition-fast);
}

.main-menu nav ul li.active a::before,
.main-menu nav ul li a:hover::before {
  opacity: 1;
  left: 0;
}


/* 4. Mobile Menu (Slicknav)
-------------------------------------------------- */
.slicknav_menu {
  padding: 0;
  background: transparent;
  margin-top: 0;
}

.slicknav_btn {
  background: transparent;
  margin: 5px 5px 0;
  float: right;
  position: relative;
  top: -45px;
}

.slicknav_menutxt { display: none; }

.slicknav_icon-bar {
  background-color: var(--color-accent);
  height: 2px;
  width: 24px;
  margin: 5px 0;
}

.slicknav_nav {
  background: #333; /* Darker dropdown */
  margin: 10px 0 0;
  padding: 0;
  border-radius: 4px;
}

.slicknav_nav a {
  font-size: 14px;
  padding: 10px 15px;
  color: var(--color-text-light);
}

.slicknav_nav a:hover {
  background: var(--color-accent);
  border-radius: 0;
  color: var(--color-primary-dark);
}


/* 5. Hero Section
-------------------------------------------------- */
.hero-area {
  min-height: 635px;
  position: relative;
  background: url(../images/bg/appvideo-bg.jpg) center/cover no-repeat; /* Example background image */
}

.full-height {
  height: 100vh;
}

.slider_overlay {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 100%;
  background: #000;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 56px;
  color: var(--color-text-light);
  text-transform: uppercase;
  margin: 0 0 20px;
  font-weight: 900;
  font-family: var(--font-primary);
  line-height: 1.2;
}

.hero-content h1 .sub-heading {
  display: block;
  font-size: 28px;
  font-weight: 400;
  text-transform: none;
  margin-top: 10px;
  letter-spacing: 1px;
}

.hero-content .hero-sub-title {
  color: var(--color-text-light);
  font-size: 18px;
  line-height: 28px;
  max-width: 90%;
  opacity: 0.9;
}

.hero-content a.btn-register {
  display: inline-block;
  font-size: 18px;
  color: var(--color-text-dark);
  background: var(--color-background-light);
  padding: 14px 45px;
  border-radius: 5px;
  margin-top: 40px;
  font-weight: 500;
  text-transform: uppercase;
  border: 2px solid transparent;
}

.hero-content a.btn-register:hover {
  transform: translateY(-5px);
  background-color: #0a2eff;
  color:#fff;
}

a.scrl_me_down {
  display: block;
  position: absolute;
  left: 50%;
  bottom: 5%;
  z-index: 9;
  transform: translateX(-50%);
}

a.scrl_me_down span {
  display: inline-block;
  color: var(--color-text-light);
  font-size: 45px;
  animation: scrooldown 1.5s ease-in-out infinite;
}

@keyframes scrooldown {
  0%, 100% { transform: translateY(-5px); opacity: 1; }
  50% { transform: translateY(10px); opacity: 0.5; }
}


/* 6. Service Section
-------------------------------------------------- */
.single-service {
  text-align: center;
  padding: 30px 20px;
  border-radius: 5px;
  -webkit-transition: var(--transition-fast);
  transition: var(--transition-fast);
}

.single-service:hover {
  background-color: var(--color-background-light);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  transform: translateY(-8px);
}

.single-service h3 {
  font-size: 22px;
  color: var(--color-text-dark);
  margin-bottom: 15px;
  font-weight: 600;
}

.single-service p {
  font-size: 16px;
  line-height: 1.6;
}

/* 7. App CTA (Call to Action) Section
-------------------------------------------------- */
.appcta-content h2 {
  font-size: 34px;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.appcta-content p {
  font-size: 16px;
}

.appcta-content .links {
  margin-top: 40px;
}

.appcta-content .links a {
  display: inline-block;
  font-size: 16px;
  margin-right: 15px;
  border: 2px solid var(--color-button-cta);
  padding: 12px 35px;
  border-radius: 5px;
  color: var(--color-button-cta);
  font-weight: 600;
}

.appcta-content .links a:hover,
.appcta-content .links a.active {
  color: var(--color-text-light);
  background: var(--color-button-cta);
  box-shadow: 0 5px 15px rgba(74, 63, 191, 0.4);
  transform: translateY(-3px);
}

.appcta-right {
  text-align: right;
}


/* 8. Feature Section
-------------------------------------------------- */
.feature-item {
  margin-top: 50px;
  display: flex;
  align-items: flex-start;
  text-align: left;
}

.feature-item .icon {
  flex-shrink: 0;
  margin-right: 20px;
  height: 60px;
  width: 60px;
  border: 1px dashed #ddd;
  border-radius: 50%;
  text-align: center;
  line-height: 60px;
  font-size: 28px;
  color: var(--color-primary);
}

.right-side .feature-item .icon {
  order: 1; /* Puts icon on the right */
  margin-right: 0;
  margin-left: 20px;
}

.right-side .feature-item .content {
  order: 0; /* Puts content on the left */
}


.feature-item h3 {
  font-size: 20px;
  color: var(--color-text-dark);
  margin: 0 0 8px;
}

/* 9. Screenshot / Video Section
-------------------------------------------------- */
.screenshot-pagination { margin-top: 60px; text-align: center; }

.swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background: #dddddd;
    opacity: 1;
    margin: 0 4px;
    cursor: pointer;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.swiper-pagination-bullet-active {
  background-color: var(--color-primary);
  transform: scale(1.2);
}


/* 10. FAQ Section
-------------------------------------------------- */
.accordion-area .card {
  margin-bottom: 10px;
  border: 1px solid #eee;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: none;
}

.accordion-area .card-header {
  padding: 0;
  border-bottom: 1px solid #eee;
  background-color: var(--color-background-light);
}

.accordion-area .card-header h3 { margin-bottom: 0; }

.accordion-area .card-header h3 button {
  border: none;
  background: transparent;
  padding: 18px 50px 18px 20px;
  width: 100%;
  text-align: left;
  font-size: 16px;
  color: var(--color-text-dark);
  font-weight: 600; /* Made slightly bolder */
  cursor: pointer;
  position: relative;
  outline: none;
}

.accordion-area .card-header h3 button::before { /* Plus/Minus icon horizontal */
  content: '';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  height: 2px;
  width: 12px;
  background: var(--color-text-medium);
}

.accordion-area .card-header h3 button::after { /* Plus/Minus icon vertical */
  content: '';
  position: absolute;
  right: 25px;
  top: calc(50% - 6px);
  width: 2px;
  height: 12px;
  background: var(--color-text-medium);
  transition: transform 0.3s ease;
}

.accordion-area .card-header h3 button[aria-expanded="true"]::after {
  transform: rotate(90deg);
}

.accordion-area .card-body {
  font-size: 15px;
  line-height: 1.7;
  padding: 20px;
}

.faq-left-thumb img { max-width: 100%; }

/* 11. Footer
-------------------------------------------------- */
.footer-area {
  background-color: var(--color-primary-dark);
}

.footer-content {
  text-align: center;
}

.footer-content p {
  color: var(--color-text-subtle);
  font-size: 15px;
}


/* 12. Utility & Animation Classes
-------------------------------------------------- */
.ptb--50 { padding: 50px 0; }
.ptb--100 { padding: 100px 0; }
.pb--100 { padding-bottom: 100px; }
.pt--70 { padding-top: 70px; }

.effectupdown {
  animation: effectupdown 4s ease-in-out infinite;
}

.effectupdown2 {
  animation: effectupdown 4s ease-in-out 1s infinite;
}

@keyframes effectupdown {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
}